Marine propulsion unit



FIG. 1 is a front and right side perspective view of my new marine propulsion unit;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a bottom and right side perspective view thereof; and,

FIG. 8 is a bottom and left side perspective view thereof. 

The ornamental design for a marine propulsion unit, as shown and described. 